In a society in which it is a moral offense to be different from your neighbor your only escape is to never let them find out.

A competent and self-confident person is incapable of jealousy in anything. Jealousy is invariably a symptom of neurotic insecurity.

It is possible that the percentage of honest and competent whores is higher than that of plumbers and much higher than that of lawyers. And enormously higher than that of professors.

There ain't no such thing as a free lunch." A Libertarian Movement slogan - The Moon Is a Harsh Mistress, 1907.

Talking with a Martian is like talking with an echo. You don't get argument but you don't get results.

Around the time of the Terran Caesar Augustus, a Martian artist had been composing a work of art. It could have been called a poem, a musical opus, or a philosophical treatise; it was a series of emotions arranged in tragic, logical necessity. Since it could be experienced by a human only in the sense in which a man blind from birth might have a sunset explained to him, it does not matter which category it be assigned.

Remember this: once the human race is established on more than one planet and especially, in more than one solar system, there is no way now imaginable to kill off the human race.